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Tyrannosaur’s last meal was two baby dinosaurs

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Dr Darla Zelenitsky and Dr Francois Therrien with the full tyrannosaur fossil (pic BBC)

The last meal of a 75-million-year-old Tyrannosaur has been revealed by scientists – two baby Dinosaurs.

Researchers say the preservation of the animal – and of the small, unfortunate creatures it ate – shines new light on how these predators lived.

It is “solid evidence that tyrannosaurs drastically changed their diet as they grew up,” said Dr Darla Zelenitsky, from the University of Calgary.

The specimen is a juvenile Gorgosaurus – a close cousin of the giant T. rex.

Diagram of prey remains inside the fossilised tyrannosaur(Image source, BBC/Royal Tyrell Museum of Palaeontology)

This particular Gorgosaur was around seven years old – equivalent to a teenager in terms of its development. It weighed about 330kg when it died – about a tenth of the weight of a fully-grown adult.

The hind limbs of two, small bird-like dinosaurs called Citipes are visible beneath its rib cage.

“We now know that these teenage [Tyrannosaurs] hunted small, young dinosaurs,” said Dr Zelenitsky, one of the lead scientists in this study, which published in the journal Science Advances.

An artist's impression of the tyrannosaur hunting
The juvenile Gorgosaur would have chased small therapods and ‘dissected’ them with its blade-like teeth (pic BBC)

An array of earlier fossil evidence, including evident bite marks on the bones of larger dinosaurs that match tyrannosaur teeth, have allowed scientists to build a picture of how the three-tonne adult Gorgosaurs attacked and ate very large plant-eating dinosaurs which lived in herds.

Dr Francois Therrien, from the Royal Tyrell Museum of Palaeontology, described these adult tyrannosaurs as “quite indiscriminate eaters”. They probably pounced on large prey, “biting through bone and scraping off flesh,” he told BBC News.

But, Dr Zelenitsky, added, “these smaller, immature tyrannosaurs were probably not ready to jump into a group of horned dinosaurs, where the adults weighed thousands of kilograms”.

‘Toes poking through the ribcage’

The fossil was originally discovered in the Alberta Badlands in 2009 – a hotspot for dinosaur hunters.

Entombed in rock, it took years to prepare and it wasn’t immediately obvious that there was prey inside. Staff at Alberta’s Royal Tyrell Museum of Palaeontology eventually noticed small toe-bones sticking out from the ribcage.

“The rock within the ribcage was removed to expose what was hidden inside,” explained Dr Therrien, who is the other lead scientist in this study. “And lo and behold – the complete hind legs of two baby dinosaurs, both under a year old.”

Dr Zelenitsky said that finding only the legs suggested that this teenage Gorgosaurus “seems to have wanted the drumsticks – probably because that’s the meatiest part”.

Diagram showing scale of adult and juvenile gorgosaurus
Adult Gorgosaurs grew to ten times the size of this 300kg juvenile (Image source, Royal Tyrell Museum of Palaeontology)

The Gorgosaurus is a slightly smaller, more ancient species than T. Rex. Fully grown, these were – as Dr Therrien put it – “big, burly tyrannosaurs”.

They transformed as they matured. “Juveniles were much more lightly built – with longer legs and very blade-like teeth,” he explained. “Adults’ teeth are all much rounder – we call them ‘killer bananas’. “This specimen is unique – it’s physical proof of the juveniles’ very different feeding strategy.

While the adults bit and scraped with their powerful “killer banana” teeth, “this animal was selecting and even dissecting its prey – biting off the legs and swallowing them whole”.

The juvenile gorgosaurus skull
The tyrannosaur’s skull and blade-like teeth (Image source, Royal Tyrell Museum of Palaeontology)

Prof Steve Brusatte, a palaeontologist from the University of Edinburgh and the National Museum of Scotland, said that seeing prey in the dinosaur’s guts gave a real insight into the animals: “They weren’t just monsters, they were real, living things and pretty sophisticated feeders.”

Recalling a depiction of T. rex in the 1993 film Jurassic Park – where the giant dinosaur chased a car through the fictional theme park – Prof Brusatte added: “A big, adult T. rex wouldn’t have chased after a car – if cars or jeeps were around back then – its body was too big, and it couldn’t move that fast.

“It would be the youngsters – like this gorgosaur – the children of T. rex that you’d have to keep an eye on.”

(BBC)



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Landslide Early Warnings issued to the Districts of Badulla, Kandy, Matale, Monaragala and Nuwara Eliya

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The Landslide Early Warning Center of the the National Building Research Organaisation [NBRO] has issued landslide early warnings to the districts of Badulla, Kandy, Matale, Monaragala and Nuwara Eliya for a period of 24 hours effective from 1200 noon today [07th January].

Accordingly,
LEVEL III RED landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Udadumbara in the Kandy district, and Nildandahinna and Walapane in the Nuwara Eliya district.

LEVEL II AMBER landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Kandaketiya in the Badulla district, Wilgamuwa in the Matale district, and Mathurata and Hanguranketha in the Nuwara Eliya district.

LEVEL I YELLOW landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Meegahakiwula, Lunugala, Welimada, Passara, Badulla and Hali_Ela in the Badulla district, Doluwa in the Kandy district,Ambanganga Korale in the Matale district, and Bibile in the Monaragala district

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Prez seeks Harsha’s help to address CC’s concerns over appointment of AG

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Chairman of the Committee on Public Finance (CoPF), MP Dr. Harsha de Silva, told Parliament yesterday that President Anura Kumara Dissanayake had personally telephoned him in response to a letter highlighting the prolonged delay in appointing an Auditor General, a vacancy that has remained unfilled since 07 December.

Addressing the House, Dr. de Silva said the President had contacted him following the letter he sent, in his capacity as CoPF Chairman, regarding the urgent need to appoint the constitutionally mandated head of the National Audit Office. During the conversation, the President had sought his intervention to inform the Constitutional Council (CC) about approving the names already forwarded by the President for consideration.

Dr. de Silva said the President had inquired whether he could convey the matter to the Constitutional Council after their discussion. He stressed that both the President and the CC must act in cooperation and in strict accordance with the Constitution, warning that institutional deadlock should not undermine constitutional governance.

He also raised concerns over the Speaker’s decision to prevent the letter he sent to the President from being shared with members of the Constitutional Council, stating that this had been done without any valid basis. Dr. de Silva subsequently tabled the letter in Parliament.

Last week, Dr. de Silva formally urged President Dissanayake to immediately fill the Auditor General’s post, warning that the continued vacancy was disrupting key constitutional functions. In his letter, dated 22 December, he pointed out that the absence of an Auditor General undermines Articles 148 and 154 of the Constitution, which vest Parliament with control over public finance.

He said that the vacancy has severely hampered the work of oversight bodies such as the Committee on Public Accounts (COPA) and the Committee on Public Enterprises (COPE), particularly at a time when the country is grappling with a major flood disaster.

As Chair of the Committee responsible for overseeing the National Audit Office, Dr. de Silva stressed that a swift appointment was essential to safeguard transparency, accountability and financial oversight.

In a separate public statement, he warned that Sri Lanka was operating without its constitutionally mandated Chief Auditor at a critical juncture. In a six-point appeal to the President, Dr. de Silva emphasised that an Auditor General must be appointed urgently in the context of ongoing disaster response and reconstruction efforts.

“Given the large number of transactions taking place now with Cyclone Ditwah reconstruction and the yet-to-be-legally-established Rebuilding Sri Lanka Fund, an Auditor General must be appointed urgently,” he said in a post on X.

By Saman Indrajith

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Govt. exploring possibility of converting EPF benefits into private sector pensions

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The NPP government was exploring the feasibility of introducing a regular pension, or annuity scheme, for Employees’ Provident Fund (EPF) contributors, Deputy Minister of Labour Mahinda Jayasinghe told Parliament yesterday.

Responding to a question raised by NPP Kalutara District MP Oshani Umanga in the House, Jayasinghe said the government was examining whether EPF benefits, which are currently paid as a lump sum at retirement, could instead be converted into a system that provides regular payments throughout a retiree’s lifetime.

“We are looking at whether it is possible to provide a pension,” Jayasinghe said, stressing that there was no immediate plan to abolish the existing lump-sum payment. “But we are paying greater attention to whether a regular payment can be provided throughout their retired life.”

Jayasinghe noted that the EPF was established as a social security mechanism for private sector employees after retirement and warned that receiving the entire fund in a single installment could place retirees at financial risk, particularly as life expectancy increases.

He also cautioned that interim withdrawals from the EPF undermined its long-term sustainability. “Even the interim payments that are given from time to time undermine the ability to give security at the time of retirement,” he said, distinguishing the EPF from the Employees’ Trust Fund, which provides more frequent interim benefits.

Addressing concerns over early withdrawals, the Deputy Minister explained that contributors have been allowed to withdraw up to 30 percent of their EPF balance since 2015, with a further 20 percent permitted after 10 years, subject to specific conditions and documentary proof.

Of 744 applications received for such withdrawals, 702 had been approved, he said.

The proposed shift towards an annuity-based system comes amid broader concerns over Sri Lanka’s ageing population and pressures on retirement financing. While state sector employees receive pensions funded by taxpayers, including EPF contributors, the EPF itself has been facing growing strain as it is also used to finance budget deficits.

Jayasinghe said the government’s focus was to formulate a mechanism that would ensure long-term income security for private sector employees, placing them on a footing closer to a pension scheme rather than a one-time retirement payout.

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